11189880 has 128 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 2750976.

The previous prime is 11189869. The next prime is 11189903. The reversal of 11189880 is 8898111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13642 + ... + 14438.

Almost surely, 2^11189880 is an apocalyptic number.

11189880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11189880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20109600).

11189880 is an abundant number, since it is smaller than the sum of its proper divisors (29029320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11189880 is a wasteful number, since it uses less digits than its factorization.

11189880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 11189880 is about 3345.1278002492. The cubic root of 11189880 is about 223.6703804185.

The spelling of 11189880 in words is "eleven million, one hundred eighty-nine thousand, eight hundred eighty".